AI Article Synopsis
- Solving baryon-number violation in nonsupersymmetric grand unified theories (GUTs) in warped higher-dimensional spacetime may lead to the discovery of a stable Kaluza-Klein particle that shares properties with right-handed neutrinos but has a fractional baryon number.
- This particle is related to the top quark and remains stable due to a combination of baryon number and SU(3) color, with potential masses ranging from 10 GeV to a few TeV.
- Future dark matter direct detection experiments are expected to test the entire parameter space of these models, and other exotic GUT partners of the top quark could be produced at high-energy colliders, showing distinct signatures.
Article Abstract
We show that solving the problem of baryon-number violation in nonsupersymmetric grand unified theories (GUT's) in warped higher-dimensional spacetime can lead to a stable Kaluza-Klein particle. This exotic particle has gauge quantum numbers of a right-handed neutrino, but carries fractional baryon number and is related to the top quark within the higher-dimensional GUT. A combination of baryon number and SU(3) color ensures its stability. Its relic density can easily be of the right value for masses in the 10 GeV-few TeV range. An exciting aspect of these models is that the entire parameter space will be tested at near future dark matter direct detection experiments. Other exotic GUT partners of the top quark are also light and can be produced at high energy colliders with distinctive signatures.
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| http://dx.doi.org/10.1103/PhysRevLett.93.231805 | DOI Listing |
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